Telegraphic transmitter.



PATENTED FEB. 4, 1908.

P. B. DELANY. TELEGRAPHIG TRANSMITTER.

APPLIOATION FILED APR.26, 1906.

nag n N VE N TOR earner PATRICK B. DELANY, OF SOUTH ORANGE, NEW JERSEY.

TELEGBAPHIC 'rnalvsmrr'rnn.

Specification of Letters Patent.

Patented Feb. 4', 1908.

Application filed April 26(1906 Serial No. 313.739.

To all whom it may concern:

T Farmer;

Be it known that .L, B. Damn Y,

a citizen of the United States of America, re-

time that a key lever is held in one position.

The invention relates more particularly to instruments of this class in which the dot forming devices are mechanicallysetinto operation by the movement of the transmitter key bythe operator.

The objects of the invention are to provide transmitters of simple and inexpensive construction provided with a key controlled The preferred form mechanically actuating automatic device that forms 'ood dot contacts of uniform character ant. interval and that is relatively undisturbed by mechanical shocksor jars,or

other surrounding intluen ces, tending to disturbance. To this end there is employed a spring controlled counterbalanced .evice, the 'momentum of which cooperating with the spring reaction produces oscillation about an axis. This. device is preferably set into operation by energy derived from the key when moved by the'transmitting operator. of such counter-balanced device is that of a peripherally weighted wheel, turning about a vertical axis, associated with a suitable spring or springs to eiiect the desired resiilt.

lnthe accompanying drawings: Figure 1 is a plan view somewhat diagrammatic in character; Fig. 2, a detail sectional view showing a modified manner of mounting the counterbalanceddevice; and Fig. 3 shows a further modification. 1

The key lever a, pivoted at b, rests'in normal position against its stop 6, d hem? the key lever spring. The rear end of the ever has an endwise adjustablebiiurcated member 6 between adjusting screws in the arms of which lies a plate spring f secured to the hub of a balance wheel 9 with a relatively heavy rim rocking about avertical axis h and from thehub of which extends also a second plate spring t opposite which are arranged two &d]U.St&l)l6 stops or posts 3', 7c, the latter being. an electrical contact. Projecting from the periphery of the wheel is an arm m adapted to bear a ainst a limiting stop when the oscillatory wheel is in normal position, as depicted in the drawing.

.M. B is the main battery, or source ot F energy, having one pole grounded and the other connected to an adjustable contact post a with which the key lever makes contact. The circuit is contmued from the hey lever by wire 0 to the hub of the oscillatory wheel and thence by spring i to line contact 7c.' f

lrVhen it is desired to transmit. one or more dots, the operator throws the key lever to the right by pressure upona thumb piece p, causing the lever to strike its contact post n, and at. the same time the bifurcated-member 0 acts upon plate spring-f to throw the balance wheel, or oscillator, in the direction indicated by the arrow.

Owing to the momentum of the wheel the spring will pass to the adjustable post g of t is bilurcatedmember, and, bearingagainst it, will yield. The longer, spring b will first come against its stop'j and then will yield until it comes against the line contactpost 7t. Hume dot only to be transmitted, the key is inunediately allowed to return to normal position; but if two or more dots are to be sent the key is held to the right and the regular oscillations of the wheel will cause successive contacts, substantially uniform as to character and period, to be made between "i and Ir. The weight of the wheel and the length ,and elasticity of springs f, i, are to be so related that the oscillation of the wheelwill con tinue during a sufiicient period to so automatically form any number of dots that -may be required. When the key lever A dash may be transmitted inany suit able manner; In. the drawihgfthere- 1s shown a separate dash switch, or key,

comprising a contact?" connected by wire c to the transmitting battery and a spring 1i connected by wire a to line.

The rate of oscillation of the wheel may be regulated by adjusting the bifurcated member c toward or from the center of motion or axis of rotation.

If the battery instead of being connected to contact post a, were connected to the hub of the oscillation, the operation would be as already described. I prefer, however, to make thc connections as shown in order that. on the first movement of the key toward normal position, the dot transmitting circuit is positively opened. This is'a'feature, applicable to auto-dot transmitters generally. v Of course,.the oscillator may be mounted otherwise than as in Fig. 1';

which contemplates that it shall turn upon a pivot or bearing. For instance, as shown in Fig. 2,1t maybe carried by a torsion spring '10 strained between adjustable supports ac.

- may therefore be shifted to different distances from its base or secured end thereby affording ,a means of adjustment of the device.

I claiin as myinvention:

1. In a telegraphic transmitter, the combination of a counterbalanced oscillator, a key lever controlling its movements, and circuit connection and contacts whereby when the oscillator is set into action, dot signals are automatically, successively transmitted.

2. In a telegraphic transmitter, the com bination of a counterbalanced oscillator, a key lever, an operative connection between the key lever and oscillator whereby. on

-- movement of the key lever the oscillator is set into operation, and circuit connections ,and contacts whereby dots may be auto matieally successively transmitted by the,

A movements'of the oscillator.

' 3. In a tele raphie transmitter, the combination of a ey lever, a circular weighted oscillator moving about a vertical axis, con

thereby, means controlled by the key lever causing artial rotations of said member alternate y in opposite directions, and meansalso controlled by the key lever for arresting movement of the rotary member. I

.6. In a telegraphic transmitter, the con1- bination of an oscillating wheel turning about a vertical axis, a pivoted key lover, a

spring interposed between it and the wheel wh'e rebyon the movement of the key lever an impulse of rotation 'is imparted to the wheel, a second fiat spring projecting fronr the wheel, a stop against which its outer end works, a line contact between said step and the wheel and circuit connections whereby as the wheel oscillates the line circuit is automatically closed and opened at said contact.

7. In a telegraphic transmitter, the combination of a wheel adapted to oscillate about a vertical axis, a key lever having a bifurcated end, a plate spring attached to the wheel and extending between the arms of such bifurcation, a second plate -s'p carried by the wheel, a sto against whlch it works and a line contact etween said stop and the wheel, a source of energy and circuit connections,- the combination operating substantially as set forth. T

In testimony whereof, I have hereunto subscribed my name. I

- PATRICK B. DELANY. Witnesses:

L. F. BROWNING, 1

E. FUWIOKS.

ring 

